| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [adv] once [art] | 10 |
|
| 2 | [coord] [adv] once a | 9 |
|
| 3 | but [adv] once [art] | 5 |
|
| 4 | [coord] [adv] once the | 5 |
|
